@import "mixin";

$color-green: rgb(59, 201, 22);
$color-pink: rgb(255, 102, 159);
$color-blue: rgb(74, 171, 255);
$color-yellow: rgb(255, 198, 102);
$color-green-transparent: rgba(59, 201, 22, .5);
$color-pink-transparent: rgba(255, 102, 159, .5);
$color-blue-transparent: rgba(74, 171, 255, .5);
$color-yellow-transparent: rgba(255, 198, 102, .5);

// 移动轨迹
$moves: (
  //  startX startY 起始位置是0  endX, endY 最终的方向
  (startX: 0, startY: 0, endX: 0, endY: 55, width: 6, height: 6, background: $color-green),
  (startX: 0, startY: 0, endX: 15, endY: 60, width: 4, height: 4, background: $color-pink-transparent),
  (startX: 0, startY: 0, endX: 35, endY: 45, width: 4, height: 4, background: $color-blue-transparent),
  (startX: 0, startY: 0, endX: 50, endY: 25, width: 6, height: 6, background: $color-yellow),
  (startX: 0, startY: 0, endX: 60, endY: 0, width: 2, height: 2, background: $color-pink-transparent),
  (startX: 0, startY: 0, endX: 50, endY: -25, width: 6, height: 6, background: $color-blue),
  (startX: 0, startY: 0, endX: 40, endY: -30, width: 3, height: 3, background: $color-green-transparent),
  (startX: 0, startY: 0, endX: 20, endY: -55, width: 5, height: 5, background: $color-pink),
  (startX: 0, startY: 0, endX: 5, endY: -45, width: 4, height: 4, background: $color-green-transparent),
  (startX: 0, startY: 0, endX: -20, endY: -50, width: 2, height: 2, background: $color-pink-transparent),
  (startX: 0, startY: 0, endX: -40, endY: -50, width: 2, height: 2, background: $color-green-transparent),
  (startX: 0, startY: 0, endX: -55, endY: -30, width: 4, height: 4, background: $color-blue),
  (startX: 0, startY: 0, endX: -55, endY: -10, width: 3, height: 3, background: $color-yellow-transparent),
  (startX: 0, startY: 0, endX: -55, endY: -5, width: 3, height: 3, background: $color-green-transparent),
  (startX: 0, startY: 0, endX: -35, endY: -7, width: 2, height: 2, background: $color-pink-transparent),
  (startX: 0, startY: 0, endX: -45, endY: 10, width: 4, height: 4, background: $color-yellow-transparent),
  (startX: 0, startY: 0, endX: -50, endY: 25, width: 6, height: 6, background: $color-pink),
  (startX: 0, startY: 0, endX: -40, endY: 35, width: 4, height: 4, background: $color-green-transparent)
);

@mixin move($index) {
  $item: nth($moves, $index);
  // keyframesName 名字不能相同 所以 + index 
  $keyframesName: "move" + $index;  
  $animationTime: .75s;
  $animationType: linear;
  $animationIterator: infinite;
  $width: map-get($item, width);
  $height: map-get($item, height);
  $backgroud: map-get($item, background);
  $startX: map-get($item, startX);
  $startY: map-get($item, startY);
  $endX: map-get($item, endX);
  $endY: map-get($item, endY);

  width: px2rem($width);
  height: px2rem($height);
  background: $backgroud;
  animation: #{$keyframesName} $animationTime $animationType $animationIterator;
  @keyframes #{$keyframesName} {
    0% {
      transform: translate3d(px2rem($startX), px2rem($startY), 0) scale(0);
      opacity: 0;
    }
    50% {
      transform: translate3d(px2rem($endX * 0.5), px2rem($endY * 0.5), 0) scale(.5);
      opacity: 1;
    }
    90% {
      transform: translate3d(px2rem($endX), px2rem($endY), 0) scale(1);
      opacity: 1;
    }
    100% {
      transform: translate3d(px2rem($endX * 1.05), px2rem($endY * 1.05), 0) scale(1);
      opacity: 0;
    }
  }
}
